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Message-ID: <20150817144409.0e40bf41@canb.auug.org.au>
Date: Mon, 17 Aug 2015 14:44:09 +1000
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Neil Brown <neilb@...e.de>, Jens Axboe <axboe@...nel.dk>
Cc: linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
Christoph Hellwig <hch@....de>,
Kent Overstreet <kent.overstreet@...il.com>
Subject: linux-next: manual merge of the md tree with the block tree
Hi Neil,
Today's linux-next merge of the md tree got a conflict in:
drivers/md/raid5.c
between commit:
4246a0b63bd8 ("block: add a bi_error field to struct bio")
8ae126660fdd ("block: kill merge_bvec_fn() completely")
from the block tree and commit:
1722781be955 ("md/raid5: switch to use conf->chunk_sectors in place of mddev->chunk_sectors where possible")
4273c3f9d668 ("md/raid5: use bio_list for the list of bios to return.")
from the md tree.
I fixed it up (see below) and can carry the fix as necessary (no action
is required).
--
Cheers,
Stephen Rothwell sfr@...b.auug.org.au
diff --cc drivers/md/raid5.c
index b29e89cb815b,4195064460d0..000000000000
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@@ -233,8 -230,7 +230,7 @@@ static void return_io(struct bio_list *
bi->bi_iter.bi_size = 0;
trace_block_bio_complete(bdev_get_queue(bi->bi_bdev),
bi, 0);
- bio_endio(bi, 0);
+ bio_endio(bi);
- bi = return_bi;
}
}
@@@ -3110,12 -3107,10 +3105,11 @@@ handle_failed_stripe(struct r5conf *con
while (bi && bi->bi_iter.bi_sector <
sh->dev[i].sector + STRIPE_SECTORS) {
struct bio *nextbi = r5_next_bio(bi, sh->dev[i].sector);
- clear_bit(BIO_UPTODATE, &bi->bi_flags);
+
+ bi->bi_error = -EIO;
if (!raid5_dec_bi_active_stripes(bi)) {
md_write_end(conf->mddev);
- bi->bi_next = *return_bi;
- *return_bi = bi;
+ bio_list_add(return_bi, bi);
}
bi = nextbi;
}
@@@ -3135,12 -3130,10 +3129,11 @@@
while (bi && bi->bi_iter.bi_sector <
sh->dev[i].sector + STRIPE_SECTORS) {
struct bio *bi2 = r5_next_bio(bi, sh->dev[i].sector);
- clear_bit(BIO_UPTODATE, &bi->bi_flags);
+
+ bi->bi_error = -EIO;
if (!raid5_dec_bi_active_stripes(bi)) {
md_write_end(conf->mddev);
- bi->bi_next = *return_bi;
- *return_bi = bi;
+ bio_list_add(return_bi, bi);
}
bi = bi2;
}
@@@ -3161,12 -3154,9 +3154,10 @@@
sh->dev[i].sector + STRIPE_SECTORS) {
struct bio *nextbi =
r5_next_bio(bi, sh->dev[i].sector);
- clear_bit(BIO_UPTODATE, &bi->bi_flags);
+
+ bi->bi_error = -EIO;
- if (!raid5_dec_bi_active_stripes(bi)) {
- bi->bi_next = *return_bi;
- *return_bi = bi;
- }
+ if (!raid5_dec_bi_active_stripes(bi))
+ bio_list_add(return_bi, bi);
bi = nextbi;
}
}
@@@ -4670,14 -4667,43 +4668,14 @@@ static int raid5_congested(struct mdde
return 0;
}
-/* We want read requests to align with chunks where possible,
- * but write requests don't need to.
- */
-static int raid5_mergeable_bvec(struct mddev *mddev,
- struct bvec_merge_data *bvm,
- struct bio_vec *biovec)
-{
- struct r5conf *conf = mddev->private;
- sector_t sector = bvm->bi_sector + get_start_sect(bvm->bi_bdev);
- int max;
- unsigned int chunk_sectors;
- unsigned int bio_sectors = bvm->bi_size >> 9;
-
- /*
- * always allow writes to be mergeable, read as well if array
- * is degraded as we'll go through stripe cache anyway.
- */
- if ((bvm->bi_rw & 1) == WRITE || mddev->degraded)
- return biovec->bv_len;
-
- chunk_sectors = min(conf->chunk_sectors, conf->prev_chunk_sectors);
- max = (chunk_sectors - ((sector & (chunk_sectors - 1)) + bio_sectors)) << 9;
- if (max < 0) max = 0;
- if (max <= biovec->bv_len && bio_sectors == 0)
- return biovec->bv_len;
- else
- return max;
-}
-
static int in_chunk_boundary(struct mddev *mddev, struct bio *bio)
{
+ struct r5conf *conf = mddev->private;
sector_t sector = bio->bi_iter.bi_sector + get_start_sect(bio->bi_bdev);
- unsigned int chunk_sectors = mddev->chunk_sectors;
+ unsigned int chunk_sectors;
unsigned int bio_sectors = bio_sectors(bio);
- if (mddev->new_chunk_sectors < mddev->chunk_sectors)
- chunk_sectors = mddev->new_chunk_sectors;
+ chunk_sectors = min(conf->chunk_sectors, conf->prev_chunk_sectors);
return chunk_sectors >=
((sector & (chunk_sectors - 1)) + bio_sectors);
}
--
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